Metal for loose leaf binder covers



Dec. 25, 1934. J, BLOORE 1,985,714

METAL FOR LOOSE LEAF BINDER COVERS Filed Dec. 4, 1933 Ernest J Bloore.

Patented Dec. 25, 1934 Ohio METAL FOR LOOSE LEAF BINDER. COVERS Ernest J. Bloore, Brampton, Ontario,- Canada,

assignor to The McBee Company, Athens,

Application December 4, 1933, Serial No. 700,776

p In Canada December '7, 1932 .1

5 Claims. (01. 129-42) 'The principal objects of this invention are to theformation of the post-engaging elements and 1 the'ar'rangement for securing same in the looking bar are extremely simple and inexpensive both to manufacture and assemble.

In the drawing Figure l is a perspective view of a binder for loose leaf book covers embodying the present invention.

Figure 2 is an elevational view of a binder as shown in Figure 1, the upper binder bar being in longitudinal mid-section.

Figure 3 is a horizontal section taken on the line 33 of Figure 2. v

Figure 4 is a perspective detail of one end of a locking plate showing a modified arrangement for adjusting the same.

Figure 5 is a part longitudinal section of a modified construction of the top bar and post.

In the manufacture of loose leaf binders it has been common practice to cut the back metals of a length of metal tube 1 having the ends closed by suitable caps and the lower metal has rigidly secured therein the posts 2. These posts are spaced apart the desired distance to accommodate the punched record sheets which are to be placed thereon. The spacing of these posts, while it is intended to be uniform, nevertheless will vary slightly through drilling or punching of holes at varying times and through variations in the diameter of metal in the posts. v

The upper metal 3 is formed similar to the lower metal and has holes 4 therein through which the binder posts 2 extend. The spacing of the drilling or punching of these holes may also vary slightly. In view of these variations it is difiicult to provide a looking or gripping device in the upper cover metal which will function uniformly and it is the particular feature of this invention to provide such locking means.

The invention consists very simply in the arrangement of a metal bar 5 preferably having the longitudinal edgesfi thereof turned upwardly to stiffen the bar and to form guiding flanges.

' Large holes 7 are bored or punched in the bar 5 which is inserted into the upper metal 3 and these holes 7 coincide with the holes 4 through which the posts'2 pass. Adjacent to each'of-the holes '7 is cut a slot or slots 8 extending transversely of the slide bar and said slots are adapted to receive a tongue or tonguesQ formedon or along one edge of the dogslO. These dogs are formed of a piece of sheet metal stamped out preferably with a transverse arch and in. theforward edge thereof is arranged a V-notch l1 whichextends either side of the-posts.

It will be seen that when the slide bar 5 is-in its proper position the dogs 10 will rest with the edges of their V-notches engaging the perimeter of the posts.

'On account of the variability of the spacing of the holes and the diameters of the posts it is desirable that the bar 5 be adjustable. In the form shown in Figures 1, 2 and 3 a short threaded shank 12 is secured preferably by welding to the bar 5 and the threaded shank extends into a thumb nut 13 which is held from longitudinal movement in a block 14 mounted in one end of the tube, a thumb nut being provided with a channel 15 which is engaged by a tongue 16 on the block.

The threaded member 12 with its engaging nuts is shown at one side of the bar 5. It may be desirable to arrange the adjusting nuts in the centre of the width of the metal and such an arrangement is illustrated in Figure 4 where the slide bar 5' has secured by welding to one end thereof a threaded shank 12. A thumb nut 13 is threaded on the shank and this is provided with a channel 15 in its perimeter intermediate of its length which is engaged by a pin 16' which is threaded through a closure cap '17.

A longitudinal movement of the slide bar 5 or 5 is limited by a pin 18 threaded through the upper metal which extends through a hole 19 arranged centrally of the length of the slide bar.

Itwill be seen that the tongues 9 of the dogs 10 are slightly offset to provide for their extending through the slots in the slide bar.

When the device is assembled the V-shaped notches of the dogs 10 .receive the binder posts and as the dogs pivot freely on the supporting tongues 9 the posts will move upwardly through the holes quite freely,-but upon an upward pressure being exerted on the upper bar, the edges of the dogs automatically grip both posts.

It will be seen that if there is any slight variation in the spacing of the posts or in their diameters or in the arrangement of the dogs such may be taken care of by turning the thumb nut engaging the threaded shanks 12 or 12', thereby adjusting the position of the locking bar.

No special forming of the slide bars is required, nor riveting '1 fastening of the locking members in place, and the simplicity of the device will be readily apparent.

It is desirable in some instances to provide a lock bar through which the posts do not extend and as shown in Figure the posts are each formed with an annular groove 20 into which the dogs extend to grip and holclthe upper metal from removal. Light springs 21 are provided to ensure the dogs. entering the grooves.

The upper metal may be released when desired by operating the slide bar by means of the thumb nut.

When a closedftop bar is used it is desirable to reinforce same to prevent the metal being deformed by repeated contact with the top ends of the posts anda reinforcing strip 22 is placed intheban. e

-What'I claim as my invention is:

-- 1. A metal forloose leaf binders of the post.

type having holes therethrough to receive the posts, a bar adjustably arranged within the metal having holes through which the posts extend, dogs pivotally mounted on said bar on axes disposed transversely of the post axes and adapted to engage and grip the posts, and threaded means for accurately and positively adjusting said slidable bar.

2. A metal for loose leaf binders of the post type having holes therethrough to receive the posts, a bar adjustably arranged within the metal having holes through which the posts extend, slots cut in said slide bar adjacent to the holes therethrough, and dogs having notched edges to engage said posts and having tongues extending into said slots and forming pivotsupports, and means for adjusting the slide bar.

3. A metal for loose leaf binders of the post type having holes therethrough to receive the posts, a bar adjustably arranged within the metal having holes through which the posts extend, slots extending transversely of the slide bar adjacent to the holes therethrough, dogs arched transversely and having tongues extending through said slots and forming pivots, said dogs having v notches in the forward edges thereof to grip the posts, and means for adjusting said slide.

4'. In aloose leaf post type'binder, a tubular member having holes to receive the binder posts, a member slidable within said tubular member, dogs pivotally mounted on the slidable member to engage and lock the posts, a threaded shank secured to the slidable member, a thumb nut threaded on said shank, and a plug closing the end of the tubular member and rotatably holding said thumb nut.

5. A loose leaf post type binder as claimed in claim 4 in which said thumb nut has a peripheral groove and said plug has a portion extending into said groove and confining the thumb nut against axial displacement.

ERNEST J. BLOORE. 

